Efficacy of Ozone against Phosphine Susceptible and Resistant Strains of Four Stored-Product Insect Species.

摘要: The efficacy of ozone was evaluated against four economically-important stored-product insect species at 27.2 C and 20.4% r.h. Adults phosphine-susceptible laboratory strains phosphine-resistant field the red flour beetle, Tribolium castaneum (Herbst), saw-toothed grain Oryzaephilus surinamensis (Linnaeus), maize weevil, Sitophilus zeamais Motschulsky, rice oryzae were exposed in vials to an concentration 0.42 g/m3 (200 ppm) for 1, 2, 3, 5, 6, 8, 10 12 h with 0 g wheat. Initial final mortalities assessed 1 5 d after exposure ozone, respectively. After 8–12-h initial mortality spp. O. 100%, whereas highest T. 90%. A 3–4-h resulted 100% spp., required a 6- 10-h ozone. least susceptible exposure, ranged between 82 95%. Time 99% (LT99) adults 2.00–5.56, 4.33–11.18 14.35–29.89 h, LT99 values not significantly different bioassays conducted absence wheat lower than those obtained presence Both -resistant equally Ozone effectively suppressed adult progeny production all species. is viable alternative fumigant control these